Nemco's Easy Onion Slicer II takes EASY to a whole new level...because a factory-pretensioned blade set NEVER, EVER, needs tightening. Thanks to the pretensioned blade cartridge, even your most inexperienced employees can easily change the blades. No wrenches required. Plus, they’ll save time and slice with impeccable consistency. Just like its predecessor, the Easy Onion Slicer II features stainless steel blades and commercial-grade aluminum construction for lasting durability. Two tiers of scalloped pre-tensioned blades ensure consistent slice thickness. Cuts up to a 4-inch-diameter colossal onion. Also cuts a wide variety of fruits and other vegetables.